New! Sign up for our free email newsletter.
Reference Terms
from Wikipedia, the free encyclopedia

Passive infrared sensors

Passive InfraRed sensors (PIRs) are electronic devices which are used in some security alarm systems to detect motion of an infrared emitting source, usually a human body.

Note:   The above text is excerpted from the Wikipedia article "Passive infrared sensors", which has been released under the GNU Free Documentation License.
Related Stories
 


Matter & Energy News

March 17, 2024

Researchers flip the switch at the nanoscale by applying light to induce bonding for single-molecule device ...
In a recent study, 151 human participants were pitted against ChatGPT-4 in three tests designed to measure divergent thinking, which is considered to be an indicator of creative ...
Using a single photograph, researchers created an algorithm that computes highly accurate, full-color three-dimensional reconstructions of areas behind obstacles -- a concept that can not only help prevent car crashes, but help law enforcement ...
Engineers have developed a new chip that uses light waves, rather than electricity, to perform the complex math essential to training AI. The chip has the potential to radically accelerate the processing speed of computers while also reducing their ...

Latest Headlines

updated 12:56 pm ET